Stringed instrument



E. FROZETH.

STRINGED INSTRUMENT.

APPLICATION FILED-APR. 12, 1921.

Pante Aug. 22', 1922.

S14/vanto@ ERNST FRQZETH v UNITED STA TES PATENTA OFFICE.

ERNST EMIL FROZETH, or MrNNneroLrs, .MrNNEsoTA- sTRINGnD INSTRUMENT,

l the hollow sound box of the instrument from a socket 19 in its innerthe tension of the strings, and thus permitting the sound box to morescientifically and accurately execute its vibratory functions, thusbringing out and properly accenting the correct tonal qualitiesof theinstrument. Further objects will be disclosed inf the course of thefollowing specification and are illustrated in the accompanying drawing,in which: y

Fig. l isI a vertical sectional view` through the center oftl a violin`embodying my invention.

F ig. 2 is an enlarged detail view ofthe heel plate 18, or as seen fromthe lett in ig. 1. i Referring to the drawing by reference characters 3designates a violin body having a neck piece 5, a linger board 6,strings a ybridge 8, and a tail piece 9, all cit common and well knownconstruction. 1n the end a of the instrument l drill two holes 10 and11,\in the latter ot which is inserted a tubular brace 12 which extendsthrough the length of the body. A extends through the brace l2, and issecured with its head 14 in a hole in the neckfpiece 5y of theinstrument. A` plug 15 may be inserted in this hole sothat it will notbenoticeable.

An angular brace 16 is inserted in the hole l0 and engages a notch 17 inthe brace 16, with its inner end. A heel plate 18 has side adapted toengage the outer end of the 'brace 16, and is provided with two notches2O in which may be secured the flexible loop 2l of the tail piece 9, tothe latter of which is secured the strings `7. The lower end of the.heel plate 18 is adjustably secured to the rod 13 by any suitablemeans, a convenient con` struction being shown, and consisting of :i setscrew 22 which is rotatably mounted in the plate but threads onto thekrod 13 so Specification of Letters Patent.

Application filed April 12, 1921.

strong wire orrod i3 Patented Aug. 22, 1922. rSerial No. 460,753.

that whenfit is turned the lower end of the heel plate will be adjustedcloser to or fartheraway from the instrument, asdesired. l't'will thusybe seen that with the various parts constructed and properly adjustedvas above described, the strain caused by the tautness oi4l the strings 7will be taken up entirely by the parts'9, 21, 18, 16, l2, 13, 22, 14 and5, leaving the sound box or body of the instrument free to vibrate as itproperly should do.

it is of course understood that the invention as here disclosed ispurely illustrative.

and is not to be taken in a limiting sense. Suitable modifications lmaybe made, provided, however, that suoli modiiications come within thespirit and scope of the appended claims. Having' now. therefore fullyshown and described my invention whatl claim to be new and desire toprotect by United States Letters Patent is:

1.The combination with a stringed instrument having a hollow sound boxand a neck piece secured thereon, of a heel plate at the butt end `ofthe instrument, strings positioned over the face of the instrument andmeans ior securing' them to the heel plate, a hollow brace extendinglongitudinally within the sound box, a rod within the brace, said rodbeing secured at one end in the neck piece and having its other endterminating in the heel plate,fan angular brace bracing the heel plateagainst the first mentioned brace whereby the plate will be spaced Afromthe sound box.

2. The combination with a stringed instruinent having a p a neckpiecesecured thereon, of a heel plate at the `butt end of the instrument,strings positioned over the face of the instrument and ineansy forsecuring them to the heel plate, a hollowbrace extending longitudinallywithin the sound box, a rod within the brace, said rod being secured atone end in the neck piece and having its/other end hollow" sound box andplate, a hell brace hai-ring a no'teh in its rear part extendinglongitudinally within the sound box, a rod Within the brace, said rodbeing secured at one endl in the neck piece and at its other end in theheel plate, an angular brace exteiulinethrough the butt end of the soundhoi; sain angular brace and said engaging` the heel plate at one endbrace noteh with the other end.

Ll. The combination with a stringed instrument having a hollow soun dlooX and a neck piece secured thereonj of a heel plate at the butt endof the instrument., strings positioned over the face of the instrumentand means for anchoring the strings to the heel plate Consisting oit atail piece hav ing a loop adapted 'to be secured in a pair oit angularnotches in the heel plate; a hollow brace extending` longitudinallyWithin the sound box, a rod Within the brace, said rod being secured atone end in the neck piece and having` its other end terminating in theheel plate, and an angular brace bracing the heel plate against thefirst inentioned brace, as and for the purpose set forth.

ln testimony whereof, I afiix my signature.

ERNST EMIL FROZETH.

